Belt-shifter.



No. 823,352. PATENTED JUNE 12, 1906. D. MoDONALD. BELT SHIPTER.

APPLICATION FILED AUG. 15, 1905.

Q mm:

memloz DONALD MoDONALD, OF CRYSTAL, NORTH DAKOTA.

'BELT-SHIFTER.

Specification of Letters Patent.

Patented "l'une 12, 1906.

Application filed August 15, 1905. Serial No. 274,389.

T0 aZZ whom it may concern:

Be it. known that I, DONALD MCDONALD, a citizen of the United States,residing at Crystal, in the county of Pembina, State of North Dakota,have invented certain new and useful Improvements in Belt-Shifters; andI do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to belt-shifters.

One object of the invention is to provide means for the ready shiftingor removal of a belt from the beltwheel of a threshing-machine engine.

Another object of the invention resides in the provision of a simple,inexpensive, durable, and efficient means for the ready shifting orremoval of a belt from a belt-wheel of a threshing-boiler or othermachine or apparatus.

With these and other objects in view the present invention consists inthe combination and arrangement of parts, as will be hereinafter morefully described, shown in the accompanying drawings, and particularlypointed out in the appended claims.

In the drawings, Figure 1 is a top plan view of my invention. Fig. 2is aside elevation. Fig. 3 is a detail view of the shiftinglever.

While it will-be understood that my invention is articularly applicablefor the shifting of a be t connected with a threshing-machine, it is tobe understood that the invention is equally applicable for the shiftingof belts employed in the driving of any machine. However, in theaccompanying drawings I have illustrated my invention as applied for theshifting or removing of a'belt from the belt-wheel of athreshing-machine engine.

Consideration of the accompanying drawings will therefore disclose thatthe reference character 1 designates the side of a boiler of athreshing-engine, to which is secured in any suitable manner the foot 2of a quadrantplate 3, provided with an arc-shaped slot 4 adjacent itsouter edge for a purpose presently explained.

5 designates a pulley which is secured upon the outer end of a shaft 6,journaled in the side of the boiler. In order to shift the belt 7, Iprovide a suitable arm 8, which is swung with reference to theuadrant-plate 3 by means of a suitable cab e 9, having a guideulley 10.It will be seen that the arm 8 is bifurcated at its inner end to formoppositelydisposed legs 11 and 12,'respectively, which engage the upperand lower faces of the quadrant-plate 3. By means of suitable bolts 13,piercing the said legs 11 and 12 and passing through the aforesaidarc-shaped slot 4, the arm is mounted for pivotal movement With respectto the plate 3. In order to hold the arm 8 in alinement with the side ofthe boiler, I provide a suitable spring 14, which is connected at one ofits ends to a stud 15 and its opposite end arranged for engagement witht e arm 8 tohold it normally in the said position. Now in order to shiftthe arm 8 I provide the aforesaid cable 9, and a pull upon the cablewill cause the lever 8 to assume a position at a direct right angle tothe plane of the aforesaid position of the lever, so that the bolts 13of the arm 8, sliding in the aforesaid arc-shaped slot 4, assume theosition shown in dotted lines in Fig. 1. ev'hen the arm 8 is thrown tothe position shown in dotted lines in Fig. 1, the roller 17, which ismounted at the outer end of the arm 8 between the cars 18 of the latter,will engage the inner edge of the belt 7 and throw it outwardly from thepulley 5, as will be readily understood.

What is claimed is 1. A device of the character described comprising aquadrant-shaped plate having an arc-shaped slot adjacent one of itsedges, an arm, means associated with said arm and working in the saidarc-shaped slot whereby the arm ma be shifted from one position toanother wit reference to said slot, a roller carried by the outer end ofthe arm, and a spring for returning the arm to the position from whichit is moved by said means.

2. A device of the character described comprisin a quadrant-shapedplate, the said plate aving an arc-shaped slot adjacent one of itsedges, a pulley-wheel for the guiding of a belt, an arm, means passingthrough the same and through said arc-shaped slot whereby the said armmay be pivoted to said plate, means for shifting the arm to engage thebelt to remove the latter from the aforesaid wheel, and means forreturning the arm to the position from which it is moved by theaforesaid means.

In testimony whereof I aflix my signature in presence of two witnesses.

DONALD MCDONALD.

Witnesses MURDO MATHESON, PETER MCDONALD.

